wl12xx: prevent sched_scan when not idle or not in station mode

The current firmware only supports scheduled scan in station mode and
when idle.  To prevent the firmware from crashing, return -EOPNOTSUPP
when sched_scan start is called in an invalid state.

Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c
index 668ff46a6824..f37e5a391976 100644
--- a/drivers/net/wireless/wl12xx/scan.c
+++ b/drivers/net/wireless/wl12xx/scan.c
@@ -505,6 +505,12 @@ int wl1271_scan_sched_scan_start(struct wl1271 *wl)
 
         wl1271_debug(DEBUG_CMD, "cmd periodic scan start");
 
+        if (wl->bss_type != BSS_TYPE_STA_BSS)
+                return -EOPNOTSUPP;
+
+        if (!test_bit(WL1271_FLAG_IDLE, &wl->flags))
+                return -EBUSY;
+
         start = kzalloc(sizeof(*start), GFP_KERNEL);
         if (!start)
                 return -ENOMEM;